MaTestLab > ASTM Methods > Ceramics > ASTM C881 Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete
Last updated 14th June 2025
ASTM C881 Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete
The ASTM C881 defines requirements for the epoxy-resin-based bonding system used with concrete in various construction and repair applications. This two-clock adhesive concrete is employed to bond to the concrete, seal cracks, anchor dowels, and coat reinforcement to bond. Standard classifies the epoxy system by type, grade, and class to ensure its performance in specific conditions, such as elevated temperatures, moisture, or extended treatment time. This specification is important to ensure the structural integrity, durability, and compatibility of epoxy applications in civil engineering projects, from bridges and pavements to pre-installed and post-install systems.
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ASTM C881 Introduction
The ASTM C881 standardizes these systems to ensure frequent performance and reliability when used in structural repair, retrofit, and anchoring applications. The epoxy-resin bonding system is widely used for its extraordinary adhesive strength, chemical resistance, and durability in construction. This not only addresses the physical and mechanical properties of the adhesive but also its behavior under various environmental and service conditions. This allows engineers and contractors to select appropriate formulations based on job site demands and performance expectations.
ASTM C881 Test Method
Key Performance Criteria
Bond strength, compressive strength, tensile strength, elongation, heat deflection temperature, and gel time.
Product Categorization
Products are categorized by: Type (I–VII): Depends on use (e.g., bonding or sealing). Grade (1–3): Relates to viscosity. Class (A–C): Pertains to service temperature.
ASTM C881 Equipment and Sample Preparation
Specimen Details
Epoxy-resin system, often tested on concrete or steel substrates
Specimen Preparation
Mix two-component resin and hardener according to the manufacturer’s instructions
Specimen Dimensions
Varies depending on the test method (e.g., C882, D695, D638)
ASTM C881 Results and Interpretation
The performance of an epoxy system is judged against the minimum values specified in this method for strength, durability, and bond quality. Bond strength for concrete is a major criterion. The system is also evaluated for gel time and heat deflection temperature to ensure working ability and service performance. Appropriate types, grades, and classification in class help specify the right product for field application, such as overhead bonding or crack injection.
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ASTM C881 Related Test Methods
ASTM D638 is used for tensile properties, and ASTM D648 for heat deflection temperature.
ASTM C881 Applications and Industry Use
This method is widely used in infrastructure repair, bridge deck rehabilitation, structural retrofitting, anchoring systems, and bonding precast or cast-in-place concrete elements. It is also common in cracked injections, joint sealing, and corrosion protection of reinforcement. The Transport Department (DOTS), Contractor, and engineers rely on the standard to select the Epoxy system for structural and non-structural relationships in both new and existing structures.
ASTM C881 Materials Commonly Tested
The materials covered by this specification include concrete for concrete, steel from concrete, or other substrates designed for other substrates. These may include separate viscosity and contribution to treatment profiles, designed for specific environmental and structural conditions.
ASTM C881 Common Challenges and Troubleshooting
Improper mix, inconsistent surface position, or temperature variations may affect epoxy performance. Field failures often arise from wrong applications, such as applying wet or contaminated surfaces to the pot life. Choosing the wrong type or class can cause separation or weak bonds. The manufacturer is required for optimal results after guidelines and surface preparation standards.
ASTM C881 Safety and Best Practices
Use the appropriate PPE when handling the epoxy components, including gloves, glasses, and respirators. Ensure proper ventilation in attached places. Follow the manufacturer’s instructions for the preparation of the mixture ratio, treatment time, and surface preparation. Settlement of unused materials and containers according to local rules to prevent environmental damage.
ASTM C881 Importance
This method ensures that the epoxy-resin bonding systems meet the rigorous performance criteria required for safe and durable application in concrete construction and repair. Standardizing classification and testing helps engineers and contractors choose the right product for structural bonding, crack sealing, or anchoring, which provides long-term service for important infrastructure.
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The required number of samples or specimens should comply with the procedure given in the astm c881 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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The turnaround time for astm c881 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm c881 tested?
You can share your astm c881 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm c881 test to various testing techniques.
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